Libreoffice calc 5 how can I take off read only

I took laptop to the shop, shifted work to an old laptop, now all my documents are read-only. How do I take read only off? It’s a couple of very big files; I’m in trouble if I cannot find a way. The other laptop also has LibreOffice. When I view these documents on my regular laptop only part of the regular Calc display shows. I tried downloading Libreoffice 5 a second time and it made no difference. I tried importing the documents using my thumb drive a second time - no difference. Do I really have to use my old laptop now to use these documents? That would be absurd. I’ve been at this all day, trying suggestion after suggestion, to no avail. I guess I could resign myself to using my old laptop just for these documents, but there must be another way.

I have now attempted to email it to myself as an attachment. Still converts to read only.

Which OS are you using? Check the owner and file permissions on the documents. It’s possible that your user id on the old laptop is not recognised as the owner of the files and you only have read access.

I went back to older laptop, downloaded the newest version of LibreOffice and emailed files as attachments. Still got read only. Then I went back to my trusty thumb drive, loaded them, downloaded onto my main laptop, and it solved the problem. I had a bit of cleaning up to do cleaning out old versions of files no no read-only copies sneaked in. It took a whole day to solve it but there it is. Some older version of Libre converted the files to read only when transferred back to Version 5. on another computer - for some unknown reason. It could have occurred because of using either email attachments and thumb drives to transfer, or it could have been an incompatibility between early Libre (which may have once had those same documents in a Windows office - these are old documents in continual usage through each new LibreOffice update), and the current libreOffice 5. We’re back to nermol.